<template>
    <div>
        <h1>当前求和为：{{ sum }}</h1>
        <h3>当前求和放大10倍为: {{ bigSum }}</h3>
        <h3>我在{{ school }}, 学习{{ subject }}</h3>
        <h3 style="color: red">Person组件的总人数是：{{ personList.length }}</h3>
        <select v-model="n">
            <option :value="1">1</option>
            <option :value="2">2</option>
            <option :value="3">3</option>
        </select>
        <button @click="increment(n)">+</button>
        <button @click="decrement(n)">-</button>
        <button @click="incrementOdd(n)">当前和为奇数再加</button>
        <button @click="incrementWait(n)">等一等再加</button>
    </div>
</template>

<script>
    import {mapState, mapGetters, mapMutations, mapActions} from 'vuex'
    export default {
        name: 'Count',
        data(){
            return {
                n: 1, //用户选择的数据
            }
        },
        computed: {
            //借助mapState生成计算属性，从state中读取数据。（数组写法）
            ...mapState(['sum', 'school', 'subject', 'personList']),
            //借助mapGetters生成计算属性，从getters中读取数据。（数组写法）
            ...mapGetters(['bigSum'])
        },
        methods: {
            //借助mapMutations生成对应的方法，方法中会调用commit去联系mutations（对象写法）
            ...mapMutations({increment: 'JIA', decrement: 'JIAN'}),
            //借助mapActions生成对应的方法，方法中会调用dispatch去联系actions（对象写法）
            ...mapActions({incrementOdd: 'jiaOdd', incrementWait: 'jiaWait'}),
        },
        mounted(){
            // console.log('Count', this.$store);
            const x = mapState({sum:'sum', school: 'school', subject: 'subject'})
            console.log(x);
        }
    }
</script>

<style scoped>
    button {
        margin-left: 5px;
    }
</style>